關於無理數的四則運算:－情侶台北一日遊2016拜託大大幫忙規劃台北一日遊行程台北一日遊行程規劃台北捷運一日遊推薦台北一日遊可以怎麼安排

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Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 已解決

Aug 4th 2013, 06:38

√2+(-√2)=0
0為有理數
其實除了無理數的加法外
無理數的減法`乘法`除法也不一定為無理數
例如:√2-√2=0
√2乘√2=2
√2除√2=1
稱為無理數的四則運算不具有封閉性
但有理數的四則運算則具有此特性

參考資料我

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